Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

This vintage train once gave new meaning to “swimming upstream.”

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

Calidum et Deliciose Succosum!

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

The first declared National Monument in the United States.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

A hidden courtyard houses early 20th-century plaster masterpieces.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

An homage to everyone's favorite prehistoric cartoon family.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A kaleidoscope gallery and steampunk emporium named for a pioneering journalist.

This oversized flute-playing Ancestral Puebloan deity is also a landmark of Southwestern kitsch.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

A spiritual vortex among the red rocks in Sedona.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Breathtaking and huge 430 year old maps of Italy.